Martin has found a correlation of r = .18 between the two variables of caffeine consumption and frontal lobe activity. This correlation is more likely to be statistically significant if: 1. increased...

Martin has found a correlation of r = .18 between the two variables of caffeine consumption and frontal lobe activity. This correlation is more likely to be statistically significant if:

1. increased level of confidence

2. increased an alpha level 0f 0.01 instead of 0.05

3. measure of caffeine consumption is categorical instead of continuous

4. used larger number of participants